Honing device for cylinders



Feb. 23, 1932. J SUNNEN 1,846,371

HONING DEVICE FOR CYLINDERS Filed April 24, 1929 2 Sheets-Sheet 2 ff/- 5 2f I ll J v 7 4 Z5 In elem far Jase Hit Sara/z en fi l Patented F b. 23, 1932 PATENT OFFICE.

JOSEPH SUNNEN, 01 ST. LOUIS, MISSOURI EONING DEVICE FOR CYLINDERS application filed April 24,

This invention relates to new and useful improvements 1n nomng or lapping devices for cylinders and is an improvement upon the invention disclosed in my copending ap-' plication filed November 17-, 1927, Serial Number 233,788.

Briefly stated, the device to which my invention appertains consists of a rotatable carrier in whichare mounted longitudinally disposed cylinder engaging elements. The latter are adjustable radially relative to the axis of rotation in order to compensate for wear and to take care of various sized cylindrical chambers in which the device operates.

As disclosed in the aforesaid application, certain of said cylinder engaging elements are of non-abrasive material and are suitably arranged with respect to the abrasive elements for the purpose of steadying the device during operation and prevent chattering, thereby insuring uniform and efficient operation of the device. Originally, these non-abrasive elements have been made of hard wood but it was found in actual practice that in some cases the ,wood elements were not entirely satisfactory as the hardness of the wood varied so that said non-abrasive elements would not wear evenly in some instances. Then again, the wood elements did not always have the proper amount of braking action or drag to steady the device and eliminate completely the chatter. Other material, such as fiber, has been experimented with but r it was found not quite suitable for the purpose. a

It is the primary object of the present in vention to provide a honing device having in combination with the usual abrasive elements nonabrasive elements of yieldable hard wearing substance, such as fabric impregnated with rubber, which produces thenecessary steadying effect on the device and prevents chattering, and which at the same time has the desired wearing qualities so. that said non-abrasiveelements do not wear out faster than said abrasive elements.

Further objects of the invention are to provide a. non-abrasive cylinder engaging eleo ment having a-certain degree of resiliency so as to maintain at all times an eflicient surface Rescue) 1929. s mi No. 857,748.

contact between said elements and the cylindrical chamber in which the device operates and which will not become glazed in service but will preserve at all times the proper frictional contact with the cylinder wall.

Additional objects of the invention are to provide non-abrasive elements of strips of Y rubber and fabric which possess the necessary resiliency and Wear resisting qualities desirable in the operation of devices of the class described.

Withthese and other objects in view, my invention consists in certain novel features of construction and arrangement of'parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a side elevational view of my apparatus showing the cylinder engaging elements thereof in extended position. 70

Figure 2 is a top plan view thereof.

Figure 3 is an enlarged vertical cross section taken on line 3-3 of Figure 2.

Figure 4: is a horizontal cross section taken Figure 5 is a horizontal cross section taken on line 55 of Figure 3.

Figure 6 is an enlarged perspective detail view of one of the mounts and showing one of the non-abrasive cylinder engaging elements disposed therein.

Figure 7 is a vertical section through one of the channel members and showing a non- I abrasive element yieldingly mounted therein.

Figure 8 is a horizontal cross section through the same.

In my copending application above referred to, I disclose a honing or lapping device designed especially for honing or lap ping the cylinders of internal combustion engines, pumps, and the like, but more particularly. of automobile and airplane engines. The device is so constructed that it can be readily attached to and operated by an elec-' tric hand drill (not shown) which allows easy manipulation of the device and does not require special machining or a great deal of handling of the cylinder blocks. Thus the engine block can be operated uponwithout 1 the removal thereof from the chassls.

Referring by numerals to the accompanying drawings,'10 indicates a carrier having mounted at one of its ends a ring 11 which is pivotally connected thereto by screws 12.

This ring is pivotally supported at points disposed at right angles to screws 12 by screws 13-, which are carried by depending spaced ends 15 of a bifurcated member 16. The opposite or upper end of member 16 is 'secured to the lower end of a spindle 17 which is adapted tobe detachably' fixed to a suitable actuating mechanism, such as an electric hand drill (not shown) which allows the device to be handled with ease. The carrier 10 comprises an elongated member having enlargedends 10 and a-reduced intermediate portion 10". A bore 18 is disposed centrally and longitudinally through said carrier 10, while a series of transverse bores 19 are arranged in each end 10 of the carrier in \spaced relation with each other and with carried by carrier 10 and are movable transversely relative thereto. A cylinder engaging element 22 is secured to each mount 21 and is disposed longitudinally of carrier 10 and adapted to engage the inner surface of the cylinder into which the device is inserted.

Each'mount 21 comprises a channel member 24 arranged longitudinally of and adjacent to carrier 10 and a pair of transversely disposed bars 25 movablv arranged in the corresponding pair of bores 19, and having their outer ends secured to channel member 24 near the ends thereof. The inner ends of bars 25 are formed with rack portions 26, the teeth of which mesh with the teeth of pinion or revoluble member 20.

In the instant case,carrier 10 is provided with four mounts 21 disposed at right angles to each other with the cylinder engaging elements 22 arranged equi-distant about the c axis of revoluble member 20.

Thus, When member 20 is rotated in one direction, mounts 21 are moved into extended positigii s and, when member 20'is moved in opposite dlIBCtlOII, said mounts are retracted against carrier 10. In this manner, the cylinder engaging elements 22 can be adjusted radially with respect to the axis of the device, and the range of adjustment of said elements is governed by the length of bars 25. The

ends 10 of carrier 10, which are preferably rectangular in cross section, are each of sufiiconsequent uneven finish of the cylinders.

cient thicknessto provide the necessary bearl ing for bars so that the latter are securely mounted and have no play or loose movement in said bearings, thereby maintaining cylin-' der engaging elements 22 at all times'in proper alignment with each other and with the axis of the device.

Channel members 24. are side of the axis of each bar 25. This offsetting of the channels 24 and elements 22 is designed to place said elements 22 rearwardly of the axis of bars 25 with respect to the di- I rection of rotation of the device, in order to provide uniform engagement between said elements and the cylinder surfaces and prevent Wedginsr or binding action therebetween.

In using this device, it is desirable to steady the same during the operation thereof so as to prevent chattering and binding and the As shown in the drawings, the device is provided with four cylinderengaging elements 22. One pairof the diametrically opposed elements is formed of abrasive material, such as carborundum, as indicated at 22, while the other pair disposed at right angles to the first pair is formed of non-abrasive resilient material, such as fabric impregnated with rubber, or a suitable composition of rubber and fabric, as indicated at 22*. The material of these non-abrasive elements is of sufiicient hardness and toughness to insure wearing thereof uniformly with the abrasive elements 22". At the same time, due to the nature of the material of which they are made, a sufiicient frictional contact is produced to steady the device and prevent chat tering or uneven operation thereof.

In using-the device, it is highly desirable to provide an accurate adjustment of the elements and to lock said elements in adjusted positions against accidental movement during the operation of the device. Briefly described, this adjustment is obtainedby means of an adjusting mechanism 27 located adjacent to the upper end 10 of member 10 and manually operable for actuating, at a greatly reduced rate of speed, revoluble member 20 which aetuates arms 25. In the present instance, this adjusting mechanism 27 comprises a train of gears 28 opdisposed to one erable by an adjusting member 29. It is not believed that a detail description of the construction and operation of this adjusting mechanism 27 is necessary in the present case as it is fully described and illustrated in the aforesaid application Serial No. 233,788.

The adjusting member 29 is held in position by means of a member 30 which is secured on an extension 31 of pinion 20. A spring, such as a spring washer 32,is interposed between member 30 and said adjusting member 29.

Thus a suitable degree of pressure is exerted against said adjusting member 29 to maintill tain the latter and gearing 27 in proper reelements can take place and the device will remain-in its adjusted position at all times.

The location of the adjusting mechanism is such that it can be readily reached by the operator, and it is not necessary to either remove the device from the hand drill to which it is connected, or to move the device away from the job for purposes of adjustment as such adjustment can be readily made on the ob.

. The abrasive elements 22 are secured in position in channels 24: in any suitable man Tpl'. lhe non-abrasive elements 22 arepreferably held in position by crimping or bending one edge of the channel so that said edge crimps the element.

In the modified form shown in Figures 7 and 8, a non-abrasive element 34 is yieldably mounted in channel 35 by means of a sinuous spring member 36. This spring has a plurality of spaced contacts with the back of element 34 and with end wall 35* of channel 35and holds said element in extended position and permitting retracting movement thereof. Preferably the ends of the spring are anchored to channel member 35 as shown.

To prevent undue outward movement of element 34 the latter has extensions 34 engageable by projections or flanges 36 of channel 85.

In the operation of my device, spindle 17 is moved in a vertical plane so as to bring the cylinder engaging elements in contact with the entire surface of the cylinder, thereby insuring even finish of the cylinder. The use of elements 22 of nonabrasive material arranged between abrasive elements 22 steadies the device and eliminates chattering. greatly increases accuracy and smooth operation of the device.

My improved honing device is of compact and durable construction, and is highly eflicient in operation.

l Vhile I have shown and described the preferred form of my invention, it is obvious that the invention may be embodied in other specific forms without departing from the spirit-thereof.

I claim:

1. An apparatus of the class described comprising a revoluble carrier, mounts carried thereby and movable transversely thereof, cylinder engaging elements of abrasive ma' terial carried by certain of said mounts, cylinder engaging elements of non-abrasive elastic material carried by certain other of said This mounts, all of said elements being disposed longitudinally of the axis of rotation and spaced equidistant thereabout, and means for actuating all of said mounts and adjusting all of said elements radially of said axis.

2. An apparatus of the class described comprising in combination with a revoluble other of said elements being formed of a composition of rubber of suitable hardness and of suitable reinforcing pliable material.

3. An apparatus of the class described comprising a revoluble carrier, and a plurality of cylinder engaging elements carried thereby and disposed longitudinally of the axis of rotation, certain of said elements being formed of abrasive material, and certain other of said elements being formed of a composition of rubber and fabric to provide non-abrasive elements spaced with respect to said abrasive elements for steadying the operation-of the apparatus and prevent chattering thereof.

4. In a honing device, the combination with a revoluble carrier and a plurality of mounts carried thereby, of a series of cylinder engaging elements of abrasive material carried by certain of said mounts, and a series of cylinder'engaging elements of reinforced rubber arranged in certain other of said mounts, said last mentioned elements having a comparatively large surface contact with the cylinder surface. a

5. In a honing device, the combination with a revoluble carrier, a series of cylinder engaging elements of abrasive material, and a 1 series of cylinder engaging elements of nonabrasive material, said last-mentioned elements being formed of a composition of fabric and rubber, the fabric being disposed radially with respect to the cylinder surface.

6. In a honing device, a mount therefor provided with anoutwardly presented longitudinal seat and rearwardly and transversely extending rack portions, a non-abrasive cylinder engaging element secured in said seat and comprising an elongated strip of rubber of suitable thickness.

7. In a honing device, a mount comprising an outwardly presented channel member, and

v a pair of rack portions fixed to and extending rearwardly and transversely from said channel member and a non-abrasive cylinder engaging element secured in said channel and comprising a strip of rubber of suitable hardness and reinforced withsuitable pliable material.

8. In a honing device, a mount therefor comprising in combinations longitudinally disposed outwardly presented channel memher, a pair of spaced rack portions fixed to said Q longitudinally disposed seat, and a nonabrasive cylinder engaging element secured therein and consisting of a strip of elastic machannel member and extending rearwardly and transversely therefrom and a cylinder en- .gaging element secured in said channel, said element comprising an elongatedstrip composed of rubber, and a plurality'of layers of fabric embedded in said rubber and disposed radially with respect to the cylinder surface.

9. In a honing device,= the combination of a revoluble carrier, a series of mounts adjustably carried thereby, a plurality of cylinder engaging elements of abrasive material carried by certain of said mounts, a plurality of non-abrasive cylinder engaging elements carried by certain other of said mounts, said non-abrasive elements consisting of strips of rubber, and a plurality of layers of fabric embedded therein, andmeans for. adjusting said mounts.

10. In a honing device, the combination with a revoluble carrier, of a series of mounts carried thereby, a series of abrasive elements fixedly arranged in certain of sa1d mounts,

and a series of non-abrasive elements of rubber mounted in certaln other of sa1d mounts.

11. In a honing device, the combination of a revoluble carrier, a plurality of mounts carried thereby, a series of abrasive cylinder engaging elements carried by certain of said mounts, and a series of cylinder engaging elements of reinforced rubber carried by certain other of said mounts.

12. In a honing device, a mount therefor comprising a verticallydisposed routwardly presented channel member and a pair of rack portions secured to and extending transversely and rearwardly therefrom, and a non-abrasive element' of rubber having embedded. therein a plurality of flexible" woven material disposed in said channel member with saidflexible reinforcing material arranged radially with respect to the axis of rotation.

' 13. In a honing device,'a mount conipris- I ing an outwardly presented channel memher, and a strip of elastic material secured therein and extending therefrom for engagement with the cylinder surface.

14. In a honing device, a mount having a.

terial.

In testimony whereof I hereunto aflix signature this 4th day of April, 1929. J OSE-PH SUNNEN. 

